http://forums.2gnt.com/dcforum/DCForumID25/6800.html In this ^^^^^^^^^ post, XtremeRS says "From what i have been told, Carbon Metalic pads are used by most hard core racing people( Nascar, Indy car, ect). They wear very little, and can take a lot of heat, and transfer heat better than any other pad. They also dont produce much brake dust either. The only downfall to them, is that they can be rather noisy..they squeal"